JP2002247524A - Device and method for video recording and reproduction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce a continuous video signal without causing incompatibility by skipping a CM part. SOLUTION: The broadcast signal inputted from an antenna is restored by a tuner part to a video signal and the video signal having its information compressed by a compression part is recorded in a recording means (S1). At the same time, the video signal from the tuner part has its CM part detected by a CM detection means (S2). Position information on the detected CM part (start and end) is saved in the recording means (S3) together with the compressed video signal. A program repetitive part detecting means obtains program part data right before the CM part from the position information on the CM art (start) (S4) and performs detection processing for the program part data from the program part right after the CM part (end) (S5). It is confirmed whether there is repetitive part (S6) and when that is confirmed (Yes), position information on the program part where the program part data are detected is obtained and saved in the recording means (S7). When reproduction is performed, the part from the position information on the CM start to the position information of the obtained program part data confirmation is skipped and the reproduction processing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video recording / reproducing apparatus, and more particularly to a commercial message (hereinafter referred to as CM) when reproducing a television program which is a recorded video signal.
The present invention relates to a video recording / reproducing apparatus and a video recording / reproducing method for skipping and reproducing one of a program overlap portion in a program portion before and after a CM and a program portion before and after a CM.

[0002]

2. Description of the Related Art In a conventional video recording / reproducing apparatus of this type, various techniques for skipping a CM portion during reproduction have been proposed in view of a desire to save viewing time when viewing a recorded television program. . For example, Japanese Patent Application Laid-Open No. 2000-11488 discloses a method of judging a CM portion at the time of recording and adding a code for identifying whether the currently recorded image / audio data is that of a CM portion or a program portion. In addition, there is disclosed a technique for skipping a CM part according to an identification code given at the time of reproduction.

[0003]

However, in many television programs, as shown in FIG. 6, there is a program overlapping portion in a portion where the program portion is broadcast immediately before the CM portion and a portion where the program portion is re-broadcast immediately after the CM portion. are doing. If only the CM portion is skipped for such a television program, the same program portion for a few seconds is reproduced twice for the program overlap portion, which causes a problem that the reproduced video is uncomfortable. Was.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a video recording / reproducing apparatus and a video recording / reproducing apparatus for reproducing a continuous video signal without a sense of incongruity by skipping the CM portion of a television program. An object of the present invention is to provide a recording and reproducing method.

[0005]

In order to achieve this object, a video recording / reproducing apparatus according to the present invention comprises a video recording / reproducing apparatus for receiving and recording / reproducing a broadcast signal comprising an image signal and an audio signal. Demodulating means for demodulating the received broadcast signal to a baseband signal; compressing means for compressing the information amount of the output signal of the demodulating means; recording means for recording the output signal of the compressing means; and expanding the output signal of the recording means. Decompression means, CM detection means for detecting whether or not the television program of the received broadcast signal is a CM part, and program overlap parts overlapping before and after the CM part detected by the CM detection means And a program duplication portion detection means for detecting, wherein one of the CM portion and the program duplication portion is skipped and reproduced.

Further, in a video recording / reproducing apparatus for receiving and recording / reproducing a broadcast signal having a compressed information amount composed of an image signal and an audio signal, a demodulating means for demodulating the received broadcast signal to a baseband signal; Recording means for recording the output signal of the means, expansion means for expanding the output signal of the recording means, CM detection means for detecting whether the television program of the received broadcast signal is a CM part, and CM detection means And a program duplication portion detecting means for detecting an overlapping program duplication portion with respect to a program portion before and after the CM portion detected by (1), wherein one of the CM portion and the program duplication portion is skipped and reproduced.

[0007] Further, the program duplication portion detecting means,
The present invention is characterized in that a program overlap portion is detected by comparing an image signal and / or an audio signal in a program portion and / or superimposed character multiplexed data before and after a detected CM portion.

The video recording / reproducing method is a video recording / reproducing method for receiving and recording / reproducing a broadcast signal composed of an image signal and an audio signal. In the John program,
Skip the CM part detected by the CM detection means,
In addition, one of the overlapping program portions before and after the CM portion detected by the program overlapping portion detection means is skipped and reproduced.

According to the apparatus and the method configured as described above, one of the programs in which the CM part detected by the CM detecting means and the program part before and after the CM part detected by the program overlapping part detecting means overlaps. Reproduction can be performed by skipping the overlapping part.

Further, in order to detect the program duplication portion,
By using character multiplexed data superimposed on an image signal, an audio signal, or a video signal and using an image signal, a program duplication portion can be detected even when a CM portion has no sound or is not a character multiplex broadcast. By using the audio signal, the program duplication portion can be detected even when the program introduction image is superimposed on the video immediately after the CM, and further, by using the character multiplexed data, the overlapped portion is smaller than the detection by the image and the audio signal. The program duplication part can be detected based on the data amount.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a video recording / reproducing apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes an antenna for receiving a broadcast signal composed of an image signal and an audio signal, reference numeral 2 denotes a tuner section for demodulating a broadcast signal from the antenna 1 and converting it into a baseband video signal, and reference numeral 3 denotes a baseband video signal. A compression unit for digitizing the data and compressing the amount of information, 4 is a recording unit for temporarily recording the compressed video signal, 5 is a decompression unit for restoring the compressed video signal read from the recording unit, and 6 is a tuner unit CM detecting means 7 for detecting a CM portion from the video signal output by the program detecting means 7 for detecting a program overlapping portion in a program portion located before and after the CM portion detected by the CM detecting means 6 Means 8 is a video output switching unit.

The operation of the video recording / reproducing apparatus according to the first embodiment configured as described above will be described with reference to FIG. 1 based on the flowchart of the video recording / reproducing method shown in FIG. The broadcast signal input from antenna 1 is
After being restored to a baseband video signal by the tuner unit 2, it is supplied to the compression unit 3 to compress the information amount.
As the compression algorithm, for example, an algorithm standardized by MPEG2 can be used. This compressed video signal is recorded in the recording means 4 (S
1).

At the same time, the video signal from the tuner unit 2 is supplied to the CM detecting means 6, and the CM part in the television program is detected (S2). As a method for detecting the CM portion, for example, a bilingual broadcast mode discriminating method described in JP-A-3-158086, a stereo broadcast mode discriminating method described in JP-A-3-262287, It is possible to use a discrimination method based on silent part detection described in JP-A-2000-115712.

The position information of the CM portion (start, end) detected in this way is supplied to the recording means 4 and stored together with the image and audio signals (video signals) compressed by the compression section 3 (S3). ). As a recording medium of the recording means 4, for example, a hard disk device or an optical disk device can be used. Further, the decompression unit 5 restores the image and audio signals compressed by the compression unit 3.
It has a signal processing method corresponding to the compression method.

The program duplication portion detecting means 7 detects the program duplication portion by comparing the program portions before and after the CM portion based on the detected and stored position information of the CM portion. From the position information of the CM part (start), the program part data immediately before the CM part recorded in the recording means is obtained (S4). The same data is detected (S5). This processing S
In 5, the presence or absence of an overlapping portion (the same program portion data) is confirmed (S <b> 6), and if it is confirmed (Yes), the position information of the program portion in which the overlapping program portion data is detected is acquired and stored in the recording means 4. Save (S7).

At the time of reproducing the television program recorded in the recording means 4 by this processing, a reproduction processing for skipping from the position information of the CM start to the position information of the program partial data confirmation obtained in the above-mentioned processing S6 is performed. (See FIG. 3).

In order to detect this program overlap portion, character multiplexed data superimposed on an image signal, audio signal or video signal is used as data to be compared. Since it is essential for a signal to be broadcast by using this image signal, C
Even when the M part has no sound or is not a text multiplex broadcast, the program overlapping part can be detected.

Further, by using an audio signal, a program overlapping portion can be detected even when a program introduction image is superimposed on a video immediately after a commercial.

Further, by using character multiplexed data,
A program overlapping portion can be detected with a smaller amount of data as compared with detection by an image and an audio signal.

When reproducing the recorded television program based on the position information of the CM portion detected as described above and the detected program overlapping portion, one of the CM portion and the program overlapping portion is skipped. Thus, it is possible to perform continuous reproduction without discomfort.

FIG. 4 is a block diagram showing a configuration of a video recording / reproducing apparatus according to Embodiment 2 of the present invention. In FIG. 4, reference numeral 1 denotes an antenna for receiving a broadcast signal obtained by compressing a digitally-modulated video signal, reference numeral 2 denotes a tuner section for demodulating a broadcast signal from the antenna 1 and converting it into a baseband compressed video signal, Recording means 5 for recording the output signal of the tuner 2; a decompression section 5 for restoring the compressed video signal read from the recording means 4; a decompression section 5 'for reconstructing the output signal of the tuner 2 to a video signal; CM detecting means 7 for detecting a CM portion from the video signal output from the decompression unit 5, and a program overlapping portion 7 for detecting a program overlapping portion overlapping the program portion before and after the CM portion detected by the CM detecting means 6. The detecting means 8 is a video output switching unit.

The video recording / reproducing apparatus shown in FIG. 4 has the same configuration as that shown in FIG. 1 showing the first embodiment, and the compression section 3 is omitted because the input video signal is compressed. The output signal of the tuner unit 2 is output to the video output switching unit 8
Decompressor 5 'which restores to a video signal when direct output to
And that the CM detection means 6 is connected to the subsequent stage of the extension unit 5.

In the second embodiment, the broadcast signal input by the antenna 1 is a video signal compressed and digitally modulated by digital processing, and is a CM portion or a program portion of the video signal. The case where the information for determining the fact is not added is shown as an example. Examples of digitally modulated broadcast signals obtained by compressing the video signals by digital processing include BS digital broadcasts currently being broadcast in Japan.

When such a broadcast is received, the compression unit 3 as shown in FIG. 1 of the first embodiment is unnecessary, and the tuner unit 2 demodulates the broadcast signal into a baseband compressed video signal and then records the signal. Means 4 can be recorded. Further, since information for determining whether the part is a CM part or a program part is not added to the broadcast signal, it is necessary to detect the CM part from a signal expanded and restored into a viewable video signal by the expansion unit 5. Therefore, it is necessary to connect the CM detection means 6 to the subsequent stage of the extension unit 5.

The program overlap portion detecting means 7 compares the program portions before and after the CM portion in the compressed and recorded video signal based on the detected and stored position information of the CM portion, thereby detecting the program overlap portion. Perform detection. In order to detect a program overlapping portion, character multiplexed data superimposed on an image signal, an audio signal, or a video signal is used as data to be compared.

When reproducing the recorded television program on the basis of the detected CM portion and the position information of the detected program overlap portion, one of the CM portion and the program overlap portion is skipped. It becomes possible to reproduce.

FIG. 5 is a diagram showing a configuration of a video recording / reproducing apparatus according to Embodiment 3 of the present invention. In FIG. 5, 1
Is an antenna for receiving a digitally modulated and compressed broadcast signal, 2 is a tuner section for demodulating a broadcast signal from the antenna 1 and converting it to a compressed video signal, 4 is a recording means for recording an output signal of the tuner section 2 Reference numeral 5 denotes a decompression unit for restoring a compressed video signal read from the recording means 4 and 5 '.
Is a decompression unit for restoring the output signal of the tuner unit 2 to a video signal, and 6 is a CM for detecting a CM portion based on information added to the video signal recorded in the recording unit 4 or information for determining whether it is a program portion. Detecting means 7 is a program overlapping part detecting means for detecting overlapping program parts in the program parts before and after the CM part detected by the CM detecting means 6, and 8 is a video output switching unit.

The video recording / reproducing apparatus shown in FIG. 5 has the same configuration as that of the second embodiment shown in FIG. 4, except that the CM detecting means 6 is connected to the recording means 4. In the third embodiment, the broadcast signal input from the antenna 1 is compressed by digital processing and is a digitally modulated signal.
In this example, a case is added in which information for discriminating a part or a program part is added.

Since information for identifying a CM portion or a program portion is added to the broadcast signal, the position information of the CM portion can be read by connecting the CM detection means 6 to the recording means 4. The operation and operation after the detection of the CM portion is the same as in the second embodiment.

Based on the position information of the detected CM part and the detected program overlap part, when reproducing the recorded television program, one of the CM part and the program overlap part is skipped. It becomes possible to reproduce.

[0032]

As described above, according to the present invention,
In recording and playback of a television program that rebroadcasts a program portion immediately before a CM portion immediately after a CM portion, it is possible to skip and reproduce a program overlap portion that is broadcast after the CM portion in addition to the CM portion. In addition, there is an effect that a CM portion that does not cause any discomfort in viewing can be skipped and reproduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a video recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a flowchart showing a video recording / reproducing method according to the first embodiment of the present invention.

FIG. 3 is an image diagram showing before and after a CM portion of a video signal to be recorded and reproduced;

FIG. 4 is a block diagram showing a configuration of a video recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a block diagram showing a configuration of a video recording / reproducing apparatus according to Embodiment 3 of the present invention.

FIG. 6 is an image diagram showing before and after a CM portion of a video signal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 2 Tuner part 3 Compression part 4 Recording means 5, 5 'Decompression part 6 CM detection means 7 Program duplication part detection means 8 Video output switching part

Claims (6)

[Claims] An image recording / reproducing apparatus for receiving and recording / reproducing a broadcast signal including an image signal and an audio signal,
Demodulation means for demodulating a received broadcast signal into a baseband signal; compression means for compressing the information amount of the output signal of the demodulation means; recording means for recording the output signal of the compression means; and output signal of the recording means. Decompressing means; commercial message detecting means for detecting whether or not the received television program of the broadcast signal is a commercial message part; and programs before and after the commercial message part detected by the commercial message detecting means. A video recording / reproducing apparatus comprising: a program overlapping portion detecting means for detecting an overlapping program overlapping portion with respect to a portion, wherein the commercial message portion and the program overlapping portion are skipped and played back. 2. A video recording / reproducing apparatus for receiving and recording / reproducing a compressed broadcast signal having an information amount composed of an image signal and an audio signal, wherein demodulation means demodulates the received broadcast signal into a baseband signal. Recording means for recording the output signal of the demodulation means, decompression means for decompressing the output signal of the recording means, and commercial message detection means for detecting whether or not the received television program of the broadcast signal is a commercial message part And a program duplication part detecting means for detecting an overlapping program duplication part with respect to the program parts before and after the commercial message part detected by the commercial message detection means, wherein one of the commercial message part and the program duplication part is provided. A video recording / reproducing apparatus for skipping and reproducing. 3. The program overlapping portion according to claim 1, wherein the program overlapping portion detecting means detects a program overlapping portion by comparing image signals in the program portion before and after the detected commercial message portion. Video recording and playback device. 4. The program duplication portion according to claim 1, wherein the program duplication portion detection means detects a program duplication portion by comparing audio signals in the program portion before and after the detected commercial message portion. Video recording and playback device. 5. The program duplication portion is detected by comparing the superimposed character multiplexed data in the program portion before and after the detected commercial message portion by the program duplication portion detection means. Or the video recording / reproducing apparatus according to 2. 6. A video recording / reproducing method for receiving and recording / reproducing a broadcast signal comprising an image signal and an audio signal,
In the television program of the broadcast signal demodulated by the demodulation means and recorded in the recording means, the commercial message part detected by the commercial message detection means is skipped, and the commercial message part detected by the program duplication part detection means is skipped. A video recording / reproducing method characterized by skipping and reproducing one of the program overlapping portions where the preceding and following program portions overlap.